双阴离子型表面活性剂的合成与驱油效果

发布时间：2018-05-18 07:12

本文选题：双阴离子表面活性剂 + 三次采油　；参考：《油田化学》2017年01期

【摘要】：为提高冀东油田化学驱驱油效果,以烷基胺、丙烯酸乙酯和氯乙酸钠或3-溴丙基磺酸钠为原料合成了含有一个疏水链两个亲水基的双阴离子型表面活性剂。采用红外光谱、热重分析及pH值缓冲区测试等方法对合成产物的结构进行了表征,研究了双阴离子型表面活性剂对冀东油田原油/水界面张力的影响与驱油效果。结果表明,合成物中SS-1和SS-3含有双羧酸基团,SS-2和SS-4含有一羧基一磺酸基官能团。4种表面活性剂均可降低原油与水的界面张力,在无碱条件下原油与水的界面张力可达到10~(-2)~10~(-3)mN/m数量级;在弱碱(1.0%Na_2CO_3)条件下SS-1降低原油界面张力效果最好,可达10~(-4)~10~(-3)mN/m数量级。弱碱条件有利于提高表面活性剂的驱油效果,表面活性剂SS-1在弱碱条件下获得了在水驱基础上提高采收率13%~15%的良好效果,可用于冀东油田浅层油藏三次采油。
[Abstract]:In order to improve the effect of chemical flooding in Jidong Oilfield, a double anion surfactant containing one hydrophobic chain and two hydrophilic groups was synthesized from alkyl amine, ethyl acrylate and sodium chloroacetate or sodium 3-bromopropyl sulfonate. The structure of the synthesized products was characterized by infrared spectroscopy, thermogravimetric analysis and pH buffer test. The effect of double anionic surfactants on the interfacial tension of crude oil / water in Jidong Oilfield and the oil displacement effect were studied. The results showed that the interfacial tension of crude oil and water could be reduced by SS-1 and SS-3 containing dicarboxylic acid group SS-2 and SS-4 containing a carboxyl monosulfonic group. The interfacial tension between crude oil and water can reach the 10~(-2)~10~(-3)mN/m order of magnitude under the condition of no alkali and SS-1 can reduce the interfacial tension of crude oil by the order of 10~(-4)~10~(-3)mN/m order under the condition of weak alkalinity 1.0 and Na2CO3). The weak alkali condition is favorable to improve the oil displacement effect of surfactant. The surfactant SS-1 has achieved a good effect of 13% oil recovery on the basis of water flooding, which can be used in the tertiary oil recovery of shallow reservoirs in Jidong Oilfield.
【作者单位】：中国石油冀东油田公司瑞丰化工公司;
【分类号】：TQ423;TE357.46

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